Ever since I got my first iOS device, I've made my own ringtones on the computer, converted them to M4r format, and transferred them to my iPhone using iTunes. This is no longer working with my iPhone 6S running the latest version of iOS 9. Once I plug my phone in and sync tones, I get an error message saying the tone can't be transferred to my phone. Just to see what would happen, I transferred the same tone to my iPod 6 running the latest version of iOS 8, and it worked perfectly; I'm able to use the tone on that device. Anyone know of a work-around? I realize I can buy tones from iTunes, and I'm fine with doing that, but the one I want isn't yet available there.